We had a great time. Weather was perfect, and we got to see/do a lot.
The Fenway Park tour is a must for any old school baseball fan!! We did that, as well as going to a game the next day. We did the Duck Tour, which was very entertaining. We hung out one afternoon in Boston Commons, hit the Aquarium, did a concert on the Harbor, walked part of the Freedom Trail, visited Fenueil Hall and Quincy Market a couple of times, and hit up a ton of great restaurants. I highly recommend Mama Maria's in the North End, and Davio's in the Back Bay neighborhood.
And the Intercontinental was just awesome!!